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    • 2. 发明授权
    • In-focus detector for a binocular stereomicroscope
    • 用于双目立体显微镜的对焦检测器
    • US4516840A
    • 1985-05-14
    • US392350
    • 1982-06-25
    • Ken-ichi NakahashiShin-ichi Mihara
    • Ken-ichi NakahashiShin-ichi Mihara
    • G02B21/22G02B21/24G02B21/00
    • G02B21/22G02B21/245
    • An in-focus detector for a binocular stereomicroscope having a pair of left- and right-hand observation optics includes a pair of beam splitters, each disposed intermediate the objective lens and the eyepieces of the respective observation optics. The first one of the beam splitters introduces the optical image of a mark into one of the observation optics, which then focuses it on an object being observed. The image is then reflected by the object and passes through the other observation optics to be reflected by the second beam splitter so as to be directed externally of the observation optics and focussed on a photoelectric transducer element, which is effective to detect an in-focus condition.
    • 用于具有一对左右观察光学元件的双目立体显微镜的对焦检测器包括一对分束器,每个分束器设置在物镜的中间和各个观察光学器件的目镜之间。 分光器的第一个将标记的光学图像引入到观察光学器件中的一个中,然后将其聚焦在被观察的物体上。 然后,该图像被物体反射并穿过另一个观察光学元件以被第二分束器反射,以便被引导到观察光学器件的外部,并聚焦在光电换能器元件上,这有效地检测聚焦 条件。
    • 4. 发明授权
    • Large relative aperture telephoto lens system
    • 大相对孔径长焦镜头系统
    • US4534626A
    • 1985-08-13
    • US524082
    • 1983-08-17
    • Shin-ichi Mihara
    • Shin-ichi Mihara
    • G02B9/30G02B13/02G02B9/64
    • G02B9/30G02B13/02
    • A large relative aperture telephoto lens system comprising a first converging lens group, a diverging lens group and a second converging lens group, arranged in said first lens group being a first positive lens component made of a glass material having a large anomalous partial dispersion ratio .theta..sub.i, a negative lens component made of a glass material having a small anomalous partial dispersion ratio .theta..sub.i and at least one of a second and third positive lens components made of a glass material having a large anomalous partial dispersion ratio .theta..sub.i, whereby longitudinal chromatic aberration is corrected to a very low level.
    • 布置在所述第一透镜组中的第一会聚透镜组,发散透镜组和第二会聚透镜组的大的相对孔径远摄透镜系统是由具有大的异常部分色散比θ的玻璃材料制成的第一正透镜组件 i,由具有小的异常部分色散比θi的玻璃材料制成的负透镜部件和由具有大的异常部分色散比θi的玻璃材料制成的第二和第三正透镜部件中的至少一个,由此纵向色 像差被校正到非常低的水平。
    • 5. 发明授权
    • Vari-focal lens system
    • 变焦镜头系统
    • US4818083A
    • 1989-04-04
    • US119899
    • 1987-11-12
    • Shin-ichi Mihara
    • Shin-ichi Mihara
    • G02B15/16G02B15/173G02B15/14
    • G02B15/173
    • A vari-focal lens system comprising a first lens group having a positive focal length, a second lens group having a negative focal length, a third lens group having a positive focal length, and a fourth lens group having a positive focal length in the order from the object side and arranged that the first and third lens groups are always kept fixed, the second lens group is arranged to be movable when varying the focal length of the lens system as a whole and to be kept fixed at the time of focusing, the fourth lens group is arranged to be movable for the purpose of compensating the displacement of the focal point which occurs when varying the focal length of the lens system as a whole and to be movable also for the purpose of focusing, and the rays coming out from the third lens group becomes approximately afocal, the vari-focal lens system being further arranged that the lens group to be moved for focusing is light in weight and, moreover, arranged to have a large aperture ratio, high vari-focal ratio and high performance.
    • 一种变焦透镜系统,包括具有正焦距的第一透镜组,具有负焦距的第二透镜组,具有正焦距的第三透镜组和具有正焦距的第四透镜组, 从物体侧排列第一透镜组和第三透镜组总是保持固定的,第二透镜组被布置为在整体上改变透镜系统的焦距并且在聚焦时被保持固定的可移动, 第四透镜组被布置为可移动以便补偿当改变整个透镜系统的焦距并且为了聚焦的目的而可移动时发生的焦点的位移,并且射出的光线 从第三透镜组变得大致无焦点,变焦透镜系统进一步被布置为使得要聚焦的移动的透镜组重量轻,并且还设置为具有大的开口率,高 h变焦率和高性能。
    • 6. 发明授权
    • Large aperture long focus macro lens system
    • 大孔径长焦距微距镜头系统
    • US4792219A
    • 1988-12-20
    • US885647
    • 1986-07-15
    • Shin-ichi Mihara
    • Shin-ichi Mihara
    • G02B9/64G02B13/00G02B13/02
    • G02B9/64G02B13/00
    • A large aperture long focus macro lens system comprising a first lens group having positive refractive power, a stop, a second lens group having positive refractive power, and a third lens group in the order from the object side, the large aperture long focus marco lens system being arranged to be focused on an object at a short distance by advancing the lens system as a whole in the state that the first lens group, the stop and the second lens group are advanced integrally by varying the relative airspace in respect to the third lens group, the large aperture long focus macro lens system being arranged that aberrations are corrected favorably and the variation of aberrations at the time of focusing is small and that the working distance does not become short and the advancing amount of the lens system does not become large when focused on the object at a very short distance.
    • 大孔径长焦距微距透镜系统,包括具有正屈光力的第一透镜组,具有正屈光力的第二透镜组,具有正屈光力的第二透镜组,以及从物体侧开始的第三透镜组, 系统被布置为通过在第一透镜组,止挡和第二透镜组相对于第三透镜组改变相对空间的方向整体地推进的状态下通过前进透镜系统作为整体而在短距离处聚焦在物体上 透镜组,大孔径长焦微距透镜系统被布置为有利地校正像差,并且聚焦时的像差变化小,并且工作距离不变短,并且透镜系统的前进量不变 当在非常短​​的距离上聚焦于物体时很大。
    • 8. 发明授权
    • Photographic lens system
    • 摄影镜头系统
    • US4568151A
    • 1986-02-04
    • US592085
    • 1984-03-22
    • Shin-ichi Mihara
    • Shin-ichi Mihara
    • G02B9/34
    • G02B9/34
    • A photographic lens system for compact cameras comprising a first positive meniscus lens component having a convex surface on the object side, a second lens component having negative refractive power, a third lens component having positive refractive power and a fourth negative meniscus lens component having a convex surface on the image side, at least one of said four lens components being a cemented doublet. Said photographic lens system has a relative aperture of F/2.8, aberrations corrected sufficiently favorably and a short total length.
    • 一种用于小型照相机的照相镜头系统,包括:在物体侧具有凸面的第一正弯月透镜部件,具有负屈光力的第二透镜部件,具有正屈光力的第三透镜部件和具有凸折角度的第四负弯月形透镜部件 所述四个透镜组件中的至少一个是胶合双面胶。 所述摄影透镜系统具有F / 2.8的相对孔径,足够有利地修正像差和短的总长度。
    • 10. 发明授权
    • Large aperture ratio zoom lens system
    • 大孔径比变焦镜头系统
    • US4749267A
    • 1988-06-07
    • US748396
    • 1985-06-24
    • Shin-ichi Mihara
    • Shin-ichi Mihara
    • G02B13/18G02B15/167G02B15/17G02B15/20G02B15/00
    • G02B15/17
    • A large aperture ratio zoom lens system comprising a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having negative refractive power, and a fourth lens group comprising a front subgroup and a rear subgroup wherein the front subgroup comprises at least one negative lens component and the rear subgroup comprises at least one positive lens component, the large aperture ratio zoom lens system having at least one aspherical surface in the front subgroup, having a short overall length, a long back focal length, high resolving power and high performance, and being capable of coping with the use with an electronic image pick-up device.
    • 包括具有正折光力的第一透镜组,具有负屈光力的第二透镜组,具有负屈光力的第三透镜组和包括前子组和后子组的第四透镜组的大开口率变焦透镜系统,其中, 所述前子组包括至少一个负透镜部件,所述后子组包括至少一个正透镜部件,所述大孔径比变焦透镜系统在所述前子组中具有至少一个非球面,具有短的总长度,长后焦距 高分辨能力和高性能,并且能够应对电子图像拾取装置的使用。